Machine for filing



(No Model.) 4 Sheets-Sheet 1.

C. E. WRIGHT. MACHINE PoR FILING, SETTING, AND SIRAIGNINNING SAWS.

No. 403,214.v Patented May 14, 1889.

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i I I (No Model.) 4 Sheets-Sheet 2.

. G. E. WRIGHT. MACHINE FOR FILING, SETTING, AND STRAIGHTBNING SAWS. No. 403,314. Patented May 14, 1889.

(No Model.) 4 Sheets-Sheet 3.

C' E WRIGHT MACHINE FOB. FILING, SETTING, AND STRAIGHTENING SAWS.

Patented May 1 4, 1889l f. N A

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4 Sheets-Sheet 4..

(No Model.)

- C. E. WRIGHT.

MACHINE FOB. FILING, SETTING, AND STRAIGHTBNING SAWS.

Patented May I4, 1889.,

LI ,1N vll/727555 UNITnn STATES PATENT CFFICE.

CHARLES E. IVRIGHT, OF IVATERBURY, CONNECTICUT.

MACHINE FOR FILING, SETTING, AND STRAIGI-ITENING SAWS.

SPECIFICATION forming part of Letters Patent No. 403,314, dated May 14, 1889. Application filed November 10,1888. Serial No. 290,441. (No model.)

T0 all whom it may concern,.-

Be it known that I, CHARLES E. VRIGHT, a citizen of the United States, residing at Vaterbury, in the county of New I/Iaven and State of Connecticut, have invented certain new and useful Improvements in Machines for Filing, Setting, and Straightening Saws; and I do hereby declare the following to be a full, clear,` and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

` My invention has for its object to provide an automatic machine for tiling, setting, and straightening saws, for filing and straightening without setting, for setting and straightening without filing, 'or for straightening' without either ling or setting. My novel machine is adapted for all ordinary classes of saws, and-will be found especially valuable in filing, setting, or straightening band-saws. The essential requirements for a perfect-working machine of this class are, in addition to speed, uniformity of work and adjustability, that saws may be readily inserted and removed, that when started the machine shall require no further attention until the saw is finished, that when the saw is Vfinished no damage whatever can happen to either machine or saw if the machine is not stopped at once, that any bends that may have been formed in the saw-blade shall be wholly removed, that the tiling action shall be so controlled as to produce anl even length and uniform shape in the teeth, and, what is an eX- ceedingly important and valuable feature, that the back of each tooth be filed clear to the base of the next tooth, so that teeth of uniform height shall not be shortened by the filing operation, but teeth of eXtra length will be shortened by tiling both on the back and the under side. In order to accomplish these results in a simple, practical, and economical manner, I have devised the novel machine of Which the following description, in connection with the accompanying drawings, is a specification, similar numbers being used in the different figures to denote like parts.

Figure l is afront elevation of the machine complete; Fig. 2, a-plan view thereof; Fig. 3, a cross-section on the line :r in Fig. 1, looking toward the left; Fig. 3, a detail view showing the substitution of an adjustable spring for the weight shown in Fig. 3; Fig. 3b, a detail view of the feeding-pawl; Figs. l and 5, detail views of the parts of the saw-clamp; Fig. 6, a detail view of the rock-lever which operates the saw-clamp and carries the feedpawl; Fig. 7, a longitudinal section of the entire machine on the line fy yin Fig. 2, looking toward the front; Fig. 8, a face view of the cam-plate on the main shaft; Fig. 9, a detail viewof one of the cams detached; Fig. 10, a detail view of the iile-adjusting mechanism; and Fig. l1 is an inverted plan view of the stop-block by which the file is held out of operative position when it is desired to set or to straighten a saw without filing and without disturbing the adjustment of the file.

The position of the parts` corresponds in Figs. l, 2, and 3. The file is making the return movement and the feeding movement is taking place. In Fig. 7 the view is from the opposite side of the machine. The file is held out of operative position and one of the settingpunches is acting.

1 denotes the bed of the machine, supported by suitable legs, 2.

3 denotes the shaft, journaled in suitable brackets, 4, attached to the bed, and 5 beltpulleys upon said shaft. I have shown pulleys of different sizes to provide for different rates of speed. At the inner end of this shaft is a disk, 6, which I have shown as strengthened by ribs 7, upon the inner face of which I secure one or two cams, 8.

The operations and functions of single and duplicate cams will presently be fully explained. The disk is provided with inner and outer holes 9, either of which is adapted to receive a pin, 10, upon which crank-rod 11 is journaled, said pin being placed in the inner hole when it is desired to tile without setting and in the outer hole when it is desired to have the setting-punches act. The opposite end of this rod is attached to a crosspiece, 12, connecting slide-rods 13, which constitute a sliding carriage. These rods reciprocate in guides let on brackets l5, which are secured to the bed, one or both of said brackets being preferably made adjustable, as in dicated in Figs. 1 and 2, which the beef: ci

the right bracket is shown as enga-ging a slot, 16, in. the bed and as locked in position by a thumb-nut, l7.

It will of course be apparent that any form of sliding carriage may be used. I have shown slide-rods connected by a cross-piece on account of the simplicity and cheapness of the construction.

1S denotes the saw being operated upon, which rests upon a plate, li), said plate having blocks 2O at its ends, which retain it in position between stationary and movable clamping-plates 2l and 22, and also prevent" the saw from dropping when the clampingplates are opened.

23 denotes an opening through the bed in which the clamping-plates are placed, the stationary plate being` rigidly secured to the bed by screws passing through holes 24. (See Fig. 4.) This plate is also provided with a stud, 25, threaded at its outer end, the purpose of which will presently be explained, and with lugs 2G at the bottom, threaded to receive adj listing-screws 27, and upon which the movable Clam1L ing-plate rests. The latter plate is provided with an opening, 2S, which loosely receives the threaded stud 25 upon the stationary clamping-plate, and with ilanges 29 at its ends, which overlap the ends oi the stationary plate, thereby preventing` displacement endwise. Both of the clampingplates are provided with seinicircular g1 ooves 230, which register with each other, so as to in* close adj ustin g-screws 27.

In practice, and as shown in the drawings, I preferably form threads upon the lower portion ot' the adjusting-screws only, and form the correspon ding t'emale threads in lugs 2G. The uuthreaded continuations of these screws are provided with reduced ends 3l to engage corresponding sockets in hubs 32, which extend downward from plate lil and lie loosely in grooves 3U. ,'lheobject of this construction is to secure a simple and perfectly-reliable adjustment oit the plate against which the back ci the saw rests, it being of course apparent that the machine will be required to operate upon saws of varying widths and to give various degrees of set to the teeth, which will necessitate the raising or lowerin of the supporting-plate. 'lo raise or lower said plate, adj usting-screws .7 are turned upward or downward until the teeth of the saw are at the exact height required above the top of the clamping-plates. he set-screws and sup porting-plate are then locked in position by tightening' lock-nuts 33 up against the under side of the lugs.

34 denotes a cam-plate, which is secured upon pin 25 by a nut, $55, which engages the threaded outer end thereof, and by a setscrew, 36, which passes through the plate and engages the pin, thereby locking the plate against rotary motion. .I ust within camplate and turning freely upon pin 25 is another cam-plate, 37, the inner face of which is cam-shaped to correspond with the face ot cam-plate 234, and which provided with an outwardly-extending arm, 3S, having a slot, 39, at its outer end.

The clamping mechanism and also the feeding mechanism, which I will now explain, are operated by means of a cam or cams, 8, on disk 6. These cams are secured `in position by pins 40, which engage correspondingholes in the face of the disk, and screws 4l, which pass through the disk from the opposite side and engage the cam, as indicated in Fig. 9. (See also Fig. 8 in connection therewith.) For the present I will assume that but one cam is being used upon disk 6, and will presently explain the operation when two cams are used.

42 denotes a roek-lever, which oseillatcs on pin 44, projecting Yfrom a bracket, 43, and which is provided with upper and lower arms, (denoted, respectively, by 42aand 421'.) The up per arm of this lever is adapted to engage the cam upon disk (3, and in order that I may secure ample adjustment I have provided this arm with a contact portion, 45, which I have shown in the drawings as turning freely upon pin 44 and adjusted by a set-screw, 4o, passing through the upper arm, this adjustingscrew, like the others, being provided with a lock-nut. An ad justing-serew, 47 is also pro vided in bracket 43, which engages some portion of the rock-lever below its pivotal point to limit the throw thereof, the purpose of which will presently be explained.

The construction ot rock-lever 42 will be clearly understood from Fig. G in connection with Fig. 2.

4S denotes a screw-pin which passes through slot 2li) in arm 38 and engages arm 421 of the rock-lever, and 49 a pawl pivoted to said arm and extending forward over the top ol. the clamping-plates, so as to engage the teeth of the saw that is being operated upon and feed it forward either one or two teeth at each revolution of disk (i upon shaft 3. A cord, 50, extends from the upper end of arm 38 over a pulley, 5l, and is provided with a weight, 52, the action of which is to draw arm 38 toward the back of the machine or toward the right, as seen in Fig. 3, at"the same time drawing arm 42b and the feed-pawl in the same direction and retaining the contact portion of arm 42 at its forward position against disk 6. As soon as the cam on this disk comes in contact with arm 42 it lorces it out ward-that is, toward the right, as seen in Fig. i-at the same time throwing arm 421 inward, the el't'ect of which is, through the engagement of pin 4S with slot 39 in arm 3S, to

turn the inner eam-plate, 37, backward, which releases the pressure of the clamping-plates upon the saw. At the same instant that the pressure of the clamping-plates is released pawl 49 is moved forward and carries the saw with it through its engagement with one of the teeth.

In practice I preferably weight the forward end ol the pa-wl, as at 49, (see Fig. 3",) and IOO provide an elongated opening, 49, at the opposite end, through which the pin 4S passes, that connects it to arm 42". This insures that the pawl shall be always retained in contact with the teeth of the saw, and, furthermore, that the forward movement of the pa wl against a tooth of the saw shall not take place until the pressure of the clamping-plates upon the saw is entirely removed. The instant the contact portion of arm 42il begins to ride down the incline of cam S the weight will act to draw arm 38 backward again, which carries arm 42b and the feed-pawl with it., and retains arm 42a in contact with the side of disk G, these actions being continuously repeated and the saw fed forward a single tooth at each revolution of disk 6. The operative faces of cam-plates 34 and 37 are preferably straight inclines, as shown in Figs. 1, 2, and 7. Then arm 3S is moved backward, the inclined surface of cam-plate 37 rides up the inclined surface of stationary cam-plate 34, which crowds cam-plate 37 against the movable clamping jaw, thereby locking the saw firmly. Vhen the forward movement takes place, the movable incline rides down thestationary incline, thereby releasing the pressure upon the movable clamping-plate and leaving the saw between the plates free to be carried forward by the feeding-pawl. This is an important feature of my improved construction, as it provides that the saw-blade that is being acted upon shall be locked rigidly during the time that the iile and the setting-punches are acting, as will presently be fully explained, but leaves the saw perfectly free at the instant that the feeding operation takes place. This alternate opening and closing movement of the clamping-plates upon the saw acts to straighten it perfectly, all bends and kinks being removed without the use of a hammer and without any additional operations.

If preferred, a spring, 52, may be used instead of weight 52 to close the clamping-plates upon the saw, said spring being made adjustable and one end connected to arm 38 and the other to a suitable hook or stump, 51, as is clearly shown vin Fig. 32.

In order to retain a certain amount of friction upon the saw-blade at the instant it is moved forward by the feeding-pawl, so that there will be no possibility of its being carried other than the exact distance required,l provide springs 22, the opposite ends of which are connected, respectively, to movable clamping-plate 22 and to the bed, said springs acting to hold the movable clamping-plate loosely in contact with the saw-blade during the instant that the locking-pressure of cam-plate 37 is released. stood that quite a range of saws-that is, within certain limits-maybe operated upon by a single machine.

In changing from a liner to a coarser toothed saw,or to feed a greater or less number of teeth at the saine time, the necessary change in the throw of arm 42" and the feeding-pawl It will of course be under' is effected by turning set-screw 47 either in or out, as may be required, and then securing it in position with a lock-nut, as shown.

53 denotes the file carried by a frame, 54, upon one of the guide-rods, which moves longitudinally therewith, but has oscillatory motion thereon. One end of this frame is shown as resting against a collar, 55, and the other against cross-piece 12. One end of the filethe left end, as seen in Figs. 1 and S-is held in a swiveled socket, 56, which is locked in position in frame 54 by a set-screw, 57, and the opposite end is held in asocket, 5S, which is locked in a carrier, 59, by a set-screw, 60. (See Figs. 2 and 10.) This carrier is provided with a plate, G1, having a large opening, 62, through which the guide-rod passes. The plate is attached to the frame by a screw, 63, which passes through a washer,(4,'and through opening 62 and engages frame 54, as is clearly shown in Fig. 10 in connection with Fig. 2. The plate is, in fact, little more than a loop through which the guide-rod passes. The object of this construction is to give to the file ample adjustment vertically, laterally, and axially, so that I am enabled to cause the le to act transversely to the tooth, or more or less obliquely thereto in the vertical plane,

Aor to cause the pressure upon the tooth to increase during the filing movement-that is, to cause the file to iirst touch the tooth lightlyand to act with an increasing pressure during the forward movement of the file, these changes depending, of course, upon the class of saw or the style in which it is desired to file the teeth. An ordinary iive, siX,or seven inch iile may be used without fitting the iile in the slightest. The only adjustment required in changing-from one width of saw to another is to raise or lower the saw by vmeans of plate 19. If a wider iile is inserted, it is necessary to raise it by means of sockets 5G and 58, so that the file will not come in contact with the clamping-plates. A narrower file is of course lowered in the same manner.

. 65 is a bracket at the front of the machine, as seen in Fig. 1, the base of which is provided with transverse slots (56, one onlybeing shown in Fig. 2, through which the screws pass which secure it to the bed of the machine. The f object of this adjustment will presently be explained. At the top of this bracket is a plate, 67, to the under side of which is pivoted an elongated switch-cam, G8. A spring, 60, connected to one end of this switch-cam and to any suitable arm or portion of the machine, acts to hold the opposite end of the switchcam in contact with a guidebar, 7 O, which is rigidly secured to the plate 67. As shown in the drawings, the switchcam is provided with a hub, 71, which passes through plate G7 and is held in place by a pin, 72, passing through the hub above the plate. 73 denotes a stump or projection which extends upward from frame 54 and engages the switch-cam and guide-bar 70, and 74 a spring', one end of which is connected to said frame IOC IIO

andthe other to the opposite guide-bar, its action being' to draw the frame toward the right, as seen in Fig. il, or toward the back of the nmchine, as it is viewed in Fig. i.

I have already explained the manner in which the saw is alternately clamped and fed forward, and also the manner in which the file is secured in place and rcciprocated, it being of course apparent that each rotation of shaft $3 causes the slide-rods to move forward and backward once, and that frame 5l moves with the rods. It is furthermore apparent that the tiling action of the saw must take place during the forward. movement only, and not during the return movement. This result is perfectly accoml'ilished by the switchcam and guide-bar, the action of which will be clearly miderstood from Fig. 3, which shows the position of the parts during the backward movement of the saw. (See also in this connection Fig. 2, which shows substantially the same position of the parts relatively to each other, although the switch-cam is in the latter view held out of operative position, as will presently be explained.) For convenience in description, however, suppose the block, which I designate 75, and which appears in dotted lines in Fig. 2, to be removed. Spring 6) will then draw the left end of the switch-cam toward the front and will cause the right end to rest against the guidebar. 1When the forward movement of the slide-rods frame 5ft and the file commences, stuinp 73 will be at the left and willbe drawn toward the guide-bar by spring 7l. As the forward movement takes place the stump will pass along the guide-bar, forcing the switcheam aside and passing between the guide-bar and the right end of the switch-cam. The instant the stump has passed the switch-cam will be drawn inward by spring (if) to its first position-that is, with its right end resting against the guide-bar. Then the backward :movement takes place, stump 7 3 will ride up the incline formed by the outer side of the switch-cam. This movement oscilla-tes frame 5lA on the slid e-rod against the power of spring 7 V1- and swings the file backward away from the teeth of the saw, as is clearly shown in Fig. .3. At this instant the releasing movement of the clamping-jaws takes place and the saw is moved forward a single tooth by the feeding-pawl. During the backward movement, when stump 7 i has passed the pivotal point of the switch-cam, spring 7 i, which acts upon the frame, being stronger than spring 69, which acts upon the switch-cam, will draw the left end of the switch-cam toward the guide-bar, this being the position of the parts indicated in Fig. 3,i11 which the switch-cam lies apjn'cximately parallel to the guide-bar- As soon as stump 7 3 has passed to the left beyond the switch-eam-that is, away from the point of view, as shown in Fig. mspring 7i will draw stump 7 toward the guide-bar, and spring (if) will draw the left end of the switch-cam outward and throw its right end against the guii'le-bar again. At this instant the next `forward movement begins and the operation of tiling is repeated upon the next tooth, and upon t-he return movement of the slide-rods, tile, &c.,the latter will again be swung backward away from the tile, as shown in Fig. 3. Any adj ustments that may be required to secure perfect working of this part of the mechanism-for instance, adjustment to saw-teeth of: various angles-may be readily eifeeted by loosening the screws which pass through slots (iti and shifting the position of the bracket slightly. Forinstance, by moving the right end of the base of bracket L35, as seen in Fig. 2, outward sufficiently, so that that end of the guide-bar will be farthest from the guide-rod, it willv be seen that toward the. end of each forward movement the tile will be gradually forced away :from the saw, thereby throwing the burr toward the point of the tooth and remevin g it entirely at the finish. This gives the same fine cutting iinish that only an experienced workman can get in tiling by hand. lt should be noted, furthermore, that no matter what maybe the special adjustment of the tile its action is the same upon all of the teeth when they are of uniform height and size, and if they are not uniform it quickly makes them so.

Suppose the tooth being acted up )n to be a perfect tooth. The action of the file willbe just that to which the machine has been ad justed, stump 73 riding along the guide-bar during the forward movement. Suppose, now, that a tooth longer and higher is reached. The file will come in contact with the tooth before the stump strikes the guide-bar, and the full power of spring 74 will act to draw the file against the back of the tooth. This tooth being longer also, at the next forward movement the iile will act upon its under side clear to the base, thereby reducing its size upon the outer angle also. Unless greatly out of proportion these two lin gs will reduce it to proper size. Suppose, now, that a short tooth is reached. It" very much shorter than the others it will not be touched by the ille; if only alittle shorter it will be touched at the last portion only of the forward. movement of the file, the guide-barbeing adjusted as in Fig. This is a very important feature of my invention, as the secret of smooth sawing and freedom from breakage, especially with band-saws, lies in the teeth being of uniform size and height, so that each has its own work to do and no more, as the strain can be equalizcd in no other way, and the saws prevented from breaking and bending. 7 t3 denotes the setting-ininches, which are carried by guides 7 7-upon the opposite sliderods-that is to say, the saw-frame is carried by one slide-rod and the setting-punches by the other. The setting-punches are adjust` ably secured in the guides, and the guides themselves are adj ustably secured in the guide-rods by set-screws, which I have desig nated by 7S. It will of course be :mparent TOO TIO

that these adjustments enable me to cause the setting-punches to strike a heavy orlight blow, as may be desired, and by turning the guides on the slide-rod to strike either t-he tips of the teeth or as far down toward their bases as may be required.

The action of the setting-punches is clearly illustrated in Fig. 7, which shows the posit-ion of the parts at the instant a tooth is being set by one of the punches, the iile being shown in this View as held out of operative position by block 75, as will presentlybe fully explained.

As has already been stated, my improved machine is adapted to file, set, and straighten at the same time, to file alone, to set alone, and to straighten alone. Suppose that it is desired to file and set a saw at the same time. Pin 10,' upon which the crank-rod is journaled, is placed in the outer hole, 9, in plate 6, so as to give the slide-rods their greatest reciprocation and throw the setting-punches into operative position at each movement in either direction. In the present instance, however, the left setting-punch, as seen in Fig. l, or the right, as seen in Fig. 7, is removed, or the set-screw is loosened and the punch slid backward out of operative position, and adjustingscrew 47, which engages the lower arm of rock-lever 42,which carries the feeding-pawl, and the throw of which determines the feed of the saw, is so adjusted as to cause the feedpawl to feed the saw forward two teeth instead of one at each movement. The result of this adjustment will be to cause the filing of each alternatel tooth and the setting of a tooth at the completion of each filing operation, it being of course understood that the setting-punch that is being used must be so adj Listed as to strike a tooth inclined in the same direction as the one that is being filed. If preferred, however, the right setting-punch, as seen in Fig. l, instead of the left, may be removed, the left being retained in operative position. The machine will then file each alternate tooth and at each movement will set a tooth inclined in the opposite direction from the tooth that has been filed. Having gone over the saw once, it is replaced between the clamping-plates and so adj usted that each operation of the file and the setting-punch will file and set the alternate teeth that were not operated upon at the former operation. This second operation completes the filing and setting of the saw. Should it be desired to file each alternate tooth without any setting operation, pin 10, upon which the crankrod is journaled, would be placed in the inner hole, 9, in the disk 6, so as to lessen the throw of the slide-rods and the setting-punches at each reciprocation. This would require no change in the adjustment of the settingpunches, as neither of them would come in contact with the teeth of the saw. It is of course well understood that the teeth of saws are frequently filed ona bevel, the points of the teeth being slightly higher at their inn er edges and the backs of the teeth being beveled downward, leaving the outer edges highest. In order to le in this manner, after proper adj ustment of the file it is necessary to go over the saw-blade twice, the teeth inclined in one direction being filed the first time the saw is passed through and the teeth inclined in the opposite direction being tiled the second time it is passed through, the adjustment of the tile being, of course, changed to give the desired inclination to the teeth, as has been fully explained. Should it be desired to file the teeth evenlythat is, with both edges of equal height--it is only necessary to pass the saw through on ce, screw 47, which engages the lower arm of rock-lever 42, being so adjusted as to cause the feeding-pawl to carry forward one tooth at a time.

Should it be desired to set a saw Without filing, pin l0, upon which the crank-rod is journaled, is again placed in the outer hole, 9, in disk 6, so as to give the slide-rods their greatest reciprocation and throw the settingpunches into operative position at each movement in either direction. A second cam, 8, is also attached to disk 6 directly opposite the other cam. The special manner in which these cams are attached to the disk is of course not of the essence of my invention. I have shown the cams provided with pins engaging the disk, and screws passing through the disk and engaging the cams, that being a simple and perfectly reliable means of attachment, although other means may be used, if preferred. y

As has already been explained, the feeding of the saw is caused by apawl, 49, pivoted to the lower arm of rock-lever 42, the upper arm of which is held in contact with the face of the disk by a weight, and which is moved outward during each rotation of the disk by cam 8 to cause the feeding movement. When two cams are used upon disk G, it will of course be apparent that two feeding operations instead of one will take place during each revolution of the disk. This enables me to use both setting-punches at once and to set every tooth in a saw the first time it is passed through the machine, the right setting-punch, as seen in Fig. l, acting to set the teeth that are inclined toward the left, and the left settingpunch acting to set the teeth that are inclined toward the right. Then the machine is used in this manner, it is necessary that the file should be out of operative position.

rlhe le may of course be removed from the machine by loosening the set-screws which hold it in the sockets; butI preferably do not disturb the adjustment of the file in the slightest, but hold the tile-frame and file out of operative position by means of a block, 75. The general shape and the application of this block will be apparent from Figs. 2 and 7 in connection with Fig. Il, which is an inverted plan view of the block detached, Fig. 7 showing the block in elevation as seen from the back of the machine, and Fig. 2 showing it IOO IIO

Vbeing quickly reduced to an in dotted outline in plan. The special contou'r ot' this block is not of the essence of my invention. lt is simply necessary that the block be so constructed as to engage plate (57 and to pass between the switch-cam and the guide-bar, the switch-cam being partially received in a socket in the block and held substantially parallel with the guide-bar, so that stump 7 5 will pass along the outer Aface of the block and the switch-cam, but be held from passing on the inner side ot' the switch-cam. This swings frame 54 on the slide-rod and throws the file to the position shown in Fig. 7 and also in Fig. 3, although. in the latter figure the swinging oit' the saw-frame is caused by the normal action of the switch-cam instead otl by the block. In order that the operation of this block may bc clearly understood', I will designate certain ct' the partsthereof by numerals.

7 .fl denotes the tlange which rests against the inner side ot the guide-bar, as clearly shown in Fig. 7; 80, the socket which receives top plate, G7; Si, the socket which receives the hub of the switch-cam, (denoted by 71,) and 82 the socket which receives the switchcam.

lllhen two cams are in position upon disk (5 a-nd both setting-punches in operative position, no adjustment whatever of the punches is required for different widths of saws. The faces of the punches being beveled, it is simply necessary to raise or lower the saw by means of plate l 0 to give to the teeth any required amount ot set.

Should it be desired to straighten a saw without either tiling or setting, the settingpunches are retained out of operative position, as already explained, and block applied to hold the file outot1 opera-tive position. This is a valuable feature ot' my invention, as it is ot'ten necessary to remove bends from a saw that is not dull enough to need filing. The block requires no supplemental devices to hold it in position, as the parts themselves retain it firmly in place. lVhen it is desired to Iile again, the block has simply to be removed and the tile instantly returns to its operative position.

It will thus be seen that the operation of the machine is wholly automatic, whether used to iile, set, and straighten, to tile, to set, or to straighten, and, furthermore, that every tooth is filed alike through the positive and regular movement of the tile, uneven teeth even height; that every tooth has the same set imparted to it; that the rigid clamping of the saw during the Illing and setting operations straightens it perfectly and prevents it from shifting, and that the construction is such that after the last tooth has been engaged by the feeding-pawl and i'ed forward no possible damage can happen to either nlachinc or saw, no matter how long the machine may continue running. lVatching of the machine is therefore wholly un neeesssny.

It will of course be understood that the dctails ot construction may be greatly varied without departing from the principles ot' my invention.

fl claiml. ln a machine of the class described, disk (i, having a cam, S, and clam ping-plates whereby the saw is held, in combination with camplates 3i and 37, one oi. which is provided with an arm, 3S, rock-lever 42, one arm ot' which engages the disk and cam, the other arm engaging arm 3S, and means, as a cord and weight, whereby the upper arm is held in contact with the disk and cam.

2. The clamping-plates, one of which is provided with a threaded pin, 25, cam-plates 34: and 37 on said pin, one of said cam-plates having an arm, 3S, and meansfor example, the disk, cam, rock-levert?, and a weight-diereby said arm is oscillated to alternately open and close the clalnping-plates.

The clamping-plates and the cam-plates by which they are operated, one of said camplates having an arm, 3S, in combination with the rock-lever connected to said arm, and disk 5, having a cam whereby the rock-lever is oscillated.

at. The disk having cam 8 and clampingplates and cam-plates and 37, one of which is provided with an arm, 3S, in combination with a rock-lever, the upper arm of which engages the disk and cam, the lower arm of said lever being loosely connected to arm 3S, and a pawl pivoted to the lower arm of said lever, which is adapted to engage the teeth ot' a saw held by the clamping-plates.

5. The combination, with the disk, cam, and rock-lever, of the clamping-plates, camplates 34 and 37, one of said plates having' an arm which loosely engages the rock-lever, a pawl pivoted to the rock-lever and adapted to engage the teeth of a saw being' operated upon, and a weight connected to arm 3s, whereby when the swinging lever is held in contact with the disk the clamping-plates are held closed, and when said lever is en gaged by the cam the clamping-plates are loosened and the pawl is moved forward to perform the teedin operation.

e'. In a machine of the class described, disk G, having a cam upon its face, and a rock-lever, iu combination with clamping-plates tor the saw to be operated upon, cam-plates 3-1- and 37, an arm, 3S, rigidly connected to one of the cam-plates and loosely connected to the swinging lever, and a weight connected to arm 38, whereby the clalnping-plates are held closed and the swinging lever held in engagement with the cam.

7. Disk 6, having cam S, and a rock-lever adapted to engage said` cam, in combination with stationary and movable clamping-plates, cam-plates 3iand 37, which act on the movable clamping-plate, and an arm, 38, rigidly connected to one of the cam-plates and loosely connected to the rock-lever, whereby when said lever is moved by the cam theelainpinguit IOO

plates are loosened, as and for the purpose set forth.

8. Disk 6, having a cam upon its face, and arock-lever, the upper arm of which is adapted to engage said cam, in combination with a stationary cam-plate, 21, having a threaded stud, 25, a clamping-plate, 22, moving on said stud, a cam-plate, 34, fixed on said stud, and a clamping-plate, 37, adapted to turn thereon and having an arm, 38, which enga ges the lower arm of the rock-lever, and a weight connected to arm 38, which holds the cam-plates at their closed position until the rock-lever is lifted by the cam.

9. Disk 6, having a cam upon its face, and a rock-lever, the upper arm of which is adapted to engage said cam, in combination with a stationary clamping.- plate, 21, having a threaded stud, 25, a clamping-plate, 22, moving on said stud, a cam-plate, 34, fixed on said stud, and a cam-plate, 37, adapted to turn thereon and having an arm, 38, which engages the lower arm of the rock-lever, and a pawl pivoted to the lower end of said lever and adapted to engage the teeth of the saw being operated upon, said pawl being moved forward to feed the saw at the instant the clampingplates are loosened by the engagement of the cam with the rock-lever.

10. The combination, with the disk having a cam, 8, a'rock-lever, and the stationary and movable clamping-plates, of cam-plates 34 an d 37, one of which is provided with an arm engaging the rock-lever, and springs 22, whereby the movable clamping-plate is held in position at the instant it is loosened by the engagement of the cam with the rock-lever.

11. The combination, with the disk having a cam upon its face, the clamping-plates, and

cam-plates 34 and 37, one of which is provided.

with an arm, 38, of a rock-lever, 42, which is engaged by arm 38 and is provided with a contact portion, 45, which engages the cam, and a set-screw, 46, which bears against the contact portion, as and for the purpose set forth.

12. The combination, with the disk having a cam upon its face, the clamping-plates, an d cam-plates 34 and 37, one of which is provided with an arm, 38, of a rock-lever, 42, which is engaged by arm 38 and engages the cam, a pawl pivoted to said lever, which is. adapted to engage the teeth of the saw that is being operated upon, and a set-screw, 47, which engages lever 42 and determines its forward movement, thereby controlling the feed of the saw.

13. The combination, with the clampingplates having grooves 30, one being provided with lugs 26, of plate 19 between the clamping-plates to support the saw in use, and adjusting-screws 27, which pass through said lugs and engage plate 19, whereby said plate may be raised or lowered for different widths of saws.

14. The stationary clamping-plate having lugs 26, in combination with the movable clamping-plate resting on said lugs and engaging the stud, cam-plates 34 and 37 ,whereby the clamping-plates are closed together, and an adjustc ble plate, 19, between the clamping-plates, upon which the saw rests while being operated upon.

15. The stationary cam-plate having lug 26 iand threaded stud 25, in combination with the movable clamping-plate resting on said lugs and engaging the stud, cam-plates 34 and 37, whereby the clamping-plates are closed together, plate 19, upon which the saw rests and which is provided with hubs 32, and adjusting-screws 27, threaded to engage the lugs and whose upper ends 16. The combination, with the clampingplates, the cam-plates, and arm 38, of the feeding-pawl, rock-lever 42, and means, as a disk and cam, whereby said lever is oscillated to open and close the clamping-plates, thereby straightening a saw.

17. The clamping-plates, one of which is provided with lugs 26 and the other with flanges 29, in combination with a plate, 19, which supports the saw, adj Listing-screws for raising or lowering the blade, and means, substantially as described and shown, for closing the clamping-plates upon the saw.

18. The combination, with the clampingplates and cam-plates 34 and 37, whereby they are operated, of supporting-plate 19, which lies between the clamping-plates and is provided with blocks at its ends, and adjusting-screws 27, whereby said plate is raised or lowered.

19. The combination,with the slide-rods and the oscillating tile-frame having a stump, 73, of guide-bar 70, switch-cam 68, and spring 74, which holds the saw-frame in operative position, except when the stump is engaged by the switch-cam.

20. The slide-rods and an oscillating fileframe having a stump, 7 3, in combination with bracket 65, carrying guide-bar 7 0, switchcam 68, spring 69, acting to hold the switchcam in contact with the guide-bar, and spring 74, acting to hold the frame in operative position.

21. The slide-rods, frame 54, carrying the file and having stump 7 3, and spring 74, aoting as described, in combination with the guide-bar, the switch cam, and spring 69, which holds the point of the switch-cam against the guide-bar, so that in the forward movement the stump rests against theguidebar, passing within the switch-cam, thereby holding the le in operative position, and during the return movement the stump rides over the switch-cam, thereby oscillating the frame and throwing the iile'out of operative position.

22. The combination, with the slide-rods, the file, and the oscillating frame by which it is carried, said frame having a stump, 7 3, of adjustable bracket 65, a guide-bar, and a switch cam carried by said bracket, and sprin acting to hold the point of the switchengage hubs 32.

Cain in contact with the guide-bar and to hold the file-frame in the operative position, substantially as described.

255. In a machine ot' the class described, the combination,with the guide-rods, of adjustable guides seein-ed thereto and settingpnnches carried by the guides.

2-L. In a machine oi the class described, the slide-rods, frame 5i, having stump 7 3, the lilo-bracket G5, the switch-cam and the guidebar on said bracket, and a block, 75, adapted to engage the top ot' the bracket and the switch-cam, so t-hat stump 73, in both backward and forward movements,will pass along the enter tace oit' the block and the switchcam, but cannot pass within the switch-cam, thereby holding the frame in such position that the Iile is retained ont of operative position.

25. In a machine oi' the class described, the slide-rods, trame 5i, having stump 73, the tile, the guide-bar and the switch-cam which are engaged by stump 73, and a block, T5, placed over the guide-bar and switch-cam to be engaged by stump '7 when it is desired to hold the iile out of operative position.

215. The combination, with the guide-rods, crank-rod, and disk (i, having cams 8, of feeding mechanism, substantially as described, actuated by said cams, and setting-lmnches carried bythe guide-rods, which set a tooth each time the mechanism is actuated.

27. The combination, with the slide-rods, trame 5i, having stump 73, the guide-bar, and the switch-cam, oi the clamping-plates, the feeding mechanism, and disk (i, having a cranl'c-rod connected to the slide-rods, and a cam whereby the clamping-plates and `feeding mechanism are operated.

The combination, with the sliderods, file, and iframe 54.-, having stump 73, ol' the switch-cam, the guide-bar, the clamping and feeding mechanism, and disk G, having a crank-rod pivoted to the slide-rods, and a cam by wh ich the feeding and the clamping mechanism is oliicrated.

2S). The coml'iination, with the slide-rods, the Setting-punches, and the tile-frame having stump 73, et the guide-bar and the switcheam engaged by said stump, as described,

disk (i, having inner and outer holes 9, anda crank-rod connected tothe slide-rods and adapted to be pivoted in either of said holes, so that the iiling operation maybe performed either with or without the setting ol'iel'ation.

30. In a machine et' the class deseribed,the slide-rods, setting-punches, vtile-trame having stump 73, the guide-bar and switch-cam en gaged by said stump, and a block, 75, adapted to engage the switch-cam and guide-bar and to be engaged by stump 73 as it passes olii' from the switch-cam, so that the file-frame is held ont of operative position when it is de sired to set without iiling.

3l. The combilmtion, with the slide-roifls, the file-framehaving'stump 73, and the switchcam and guide-bar engaged by said stump to throw the file into and ont oi' operative position, of the elannjiing-plates, teeding-pawl, disk (5, having a crank-rod connected to the slide-rods, and a cam, S, and intermediate mechanism, substantially as described and shown, whereby the clamping-jaws are loosened and the feeding operation performed at the instant that the file is ont ol' operative position.

32. The combination, with the slide rods, the setti11g-] n1nches, and cam-plates Si and 37, one of which provided with arm 39, otdisk fi, `haviiig a crank-rod connected to the sliderods, and a cam, S, swinginglever l2, adapted t0 engage said cam and engaged by arm 13S, a feeding-pawl pivoted to said lever, and a set-screw, 4:7, which engages the lever to limit the throw el the i'eed-pawl, as set forth.

The combination, with the slide-rods, settingpunches, file, and frame 5i, having' stump 73, oi' the guide-bar and the switch-cam engaged by said stump, disk (.3, having a crank-rod connected to the slide-rods, and a cam, S, and feeding' and clamping mechanism, silbstantially as deseribei'l, operated. by said cam.

In testimony whereof I af'iix my signatn re in presence et' two witnesses.

(il IA RLES E. IVRIGI IT.

Vi'itnesses:

Roi-:nm: A. Lown, WILLIAM Nnvi een. 

